linux-kernel - Re: [PATCH 03/16] ASoC: tas2781: disable regmap regcache

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5b2eb7eb-761e-406d-8d55-b7ea8cddefa8@sirena.org.uk>
Date: Fri, 15 Dec 2023 12:55:00 +0000
From: Mark Brown <broonie@...nel.org>
To: Gergo Koteles <soyer@....hu>
Cc: Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>,
	Baojun Xu <baojun.xu@...com>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, Liam Girdwood <lgirdwood@...il.com>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH 03/16] ASoC: tas2781: disable regmap regcache

On Fri, Dec 15, 2023 at 02:17:01AM +0100, Gergo Koteles wrote:
> On Thu, 2023-12-07 at 22:39 +0000, Mark Brown wrote:
> > On Thu, Dec 07, 2023 at 10:12:13PM +0100, Gergo Koteles wrote:
> > > On Thu, 2023-12-07 at 20:36 +0000, Mark Brown wrote:

> > > > The code creates the impression that writing to one tas2781 writes to
> > > > all of them, is that not the case?

> > > Yes, the tasdevice_* functions, but the regcache_sync doesn't know
> > > this.

> > So this syncing is done in software not hardware?  My understanding was
> > that this was a hardware thing.

> If you mean that the amplifier does not know that there are several
> programs or configurations or profiles, but only runs the current one,
> yes.

No, I mean that the amplifiers don't talk to each other at a hardware
level and the grouping is all in software.

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)